Two-photon exchange and elastic electron-proton scattering

被引：315

作者：

Blunden, PG ^{[1
]}

Melnitchouk, W

Tjon, JA

机构：

[1] Univ Manitoba, Dept Phys & Astron, Winnipeg, MB R3T 2N2, Canada

[2] Jefferson Lab, Newport News, VA 23606 USA

[3] Univ Maryland, Dept Phys, College Pk, MD 20742 USA

来源：

PHYSICAL REVIEW LETTERS | 2003年 / 91卷 / 14期

基金：

加拿大自然科学与工程研究理事会;

关键词：

D O I：

10.1103/PhysRevLett.91.142304

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Two-photon exchange contributions to elastic electron-proton scattering cross sections are evaluated in a simple hadronic model including the finite size of the proton. The corrections are found to be small in magnitude, but with a strong angular dependence at fixed Q(2). This is significant for the Rosenbluth technique for determining the ratio of the electric and magnetic form factors of the proton at high Q(2), and partly reconciles the apparent discrepancy with the results of the polarization transfer technique.

引用

页数：4

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